TY - JOUR

T1 - Comparison of Real-Time In Vivo Spectral and Vector Velocity Estimation

A1 - Pedersen,Mads Møller

A1 - Pihl,Michael Johannes

A1 - Haugaard,Per

A1 - Hansen,Jens Munk

A1 - Hansen,Kristoffer Lindskov

A1 - Nielsen,Michael Bachmann

A1 - Jensen,Jørgen Arendt

AU - Pedersen,Mads Møller

AU - Pihl,Michael Johannes

AU - Haugaard,Per

AU - Hansen,Jens Munk

AU - Hansen,Kristoffer Lindskov

AU - Nielsen,Michael Bachmann

AU - Jensen,Jørgen Arendt

PY - 2012

Y1 - 2012

N2 - The purpose of this study is to show whether a newly introduced vector flow method is equal to conventional spectral estimation. Thirty-two common carotid arteries of 16 healthy volunteers were scanned using a BK Medical ProFocus scanner (DK-2730, Herlev, Denmark) and a linear transducer at 5 MHz. A triplex imaging sequence yields both the conventional velocity spectrum and a two-dimensional vector velocity image. Several clinical parameters were estimated and compared for the two methods: Flow angle, peak systole velocity (PS), end diastole velocity (ED) and resistive index (RI). With a paired t-test, the spectral and vector angles did not differ significantly (p = 0.658), whereas PS (p = 0.034), ED (p = 0.004) and RI (p <0.0001) differed significantly. Vector flow can measure the angle for spectral angle correction, thus eliminating the bias from the radiologist performing the angle setting with spectral estimation. The flow angle limitation in velocity estimation is also eliminated, so that flow at any angle can be measured.

AB - The purpose of this study is to show whether a newly introduced vector flow method is equal to conventional spectral estimation. Thirty-two common carotid arteries of 16 healthy volunteers were scanned using a BK Medical ProFocus scanner (DK-2730, Herlev, Denmark) and a linear transducer at 5 MHz. A triplex imaging sequence yields both the conventional velocity spectrum and a two-dimensional vector velocity image. Several clinical parameters were estimated and compared for the two methods: Flow angle, peak systole velocity (PS), end diastole velocity (ED) and resistive index (RI). With a paired t-test, the spectral and vector angles did not differ significantly (p = 0.658), whereas PS (p = 0.034), ED (p = 0.004) and RI (p <0.0001) differed significantly. Vector flow can measure the angle for spectral angle correction, thus eliminating the bias from the radiologist performing the angle setting with spectral estimation. The flow angle limitation in velocity estimation is also eliminated, so that flow at any angle can be measured.

KW - Vector flow

KW - In vivo

KW - Transverse oscillation

KW - Blood velocity estimation

KW - Spectral estimation

KW - Real-time

U2 - 10.1016/j.ultrasmedbio.2011.10.003

DO - 10.1016/j.ultrasmedbio.2011.10.003

JO - Ultrasound in Medicine & Biology

JF - Ultrasound in Medicine & Biology

SN - 03015629

IS - 1

VL - 38

SP - 145

EP - 151

ER -